Minix1.1/usr/src/commands/wc.c

/* wc - count lines, words and characters	Author: David Messer */

#include "stdio.h"
#define isdigit(c) (c >= '0' && c <= '9)
#define isspace(c) (c == ' ' || c == '\t' || c == '\n' || c == '\f' || c == '\r')

/*
 *
 *	Usage:  wc [-lwc] [names]
 *
 *		Flags:
 *			l - count lines.
 *			w - count words.
 *			c - count characters.
 *
 *		Flags l, w, and c are default.  
 *		Words are delimited by any non-alphabetic character.
 *
 *  Released into the PUBLIC-DOMAIN 02/10/86
 *
 *	If you find this program to be of use to you, a donation of
 *	whatever you think it is worth will be cheerfully accepted.
 *
 *	Written by: David L. Messer
 *				P.O. Box 19130, Mpls, MN,  55119
 *      Program (heavily) modified by Andy Tanenbaum 
 */


int lflag;			/* Count lines */
int wflag;			/* Count words */
int cflag;			/* Count characters */

long lcount;			/* Count of lines */
long wcount;			/* Count of words */
long ccount;			/* Count of characters */

long ltotal;			/* Total count of lines */
long wtotal;			/* Total count of words */
long ctotal;			/* Total count of characters */

main(argc, argv)
int argc;
char *argv[];
{
  int k;
  char *cp;
  int tflag, files;
  int i;

  /* Get flags. */
  files = argc - 1;
  k = 1;
  cp = argv[1];
  if (*cp++ == '-') {
	files--;
	k++;			/* points to first file */
	while (*cp != 0) {
		switch (*cp) {
			case 'l':	lflag++;	break;
			case 'w':	wflag++;	break;
			case 'c':	cflag++;	break;
			default:	usage();
		}
		cp++;
	}
  }

  /* If no flags are set, treat as wc -lwc. */
  if(!lflag && !wflag && !cflag) {
	lflag = 1;
	wflag = 1;
	cflag = 1;
  }

  /* Process files. */
  tflag = files >= 2;		/* set if # files > 1 */

  /* Check to see if input comes from std input. */
  if (k >= argc) {
	count();
	if(lflag) printf(" %6D", lcount);
	if(wflag) printf(" %6D", wcount);
	if(cflag) printf(" %6D", ccount);
	printf(" \n");
	fflush(stdout);
	exit(0);
  }

  /* There is an explicit list of files.  Loop on files. */
  while (k < argc) {
	fclose(stdin);
	if (fopen(argv[k], "r") == NULL) {
		std_err("wc: cannot open ");
		std_err(argv[k]);
		std_err("\n");
		k++;
		continue;
	} else {
		/* Next file has been opened as std input. */
		count();
		if(lflag) printf(" %6D", lcount);
		if(wflag) printf(" %6D", wcount);
		if(cflag) printf(" %6D", ccount);
		printf(" %s\n", argv[k]);
	}
	k++;
  }

  if(tflag) {
	if(lflag) printf(" %6D", ltotal);
	if(wflag) printf(" %6D", wtotal);
	if(cflag) printf(" %6D", ctotal);
	printf(" total\n");
  }

  fflush(stdout);
  exit(0);
}

count()
{
  register int c;
  register int word = 0;

	lcount = 0;
	wcount = 0;
	ccount = 0L;

  while((c = getc(stdin)) > 0) {
	ccount++;

	if(isspace(c)) {
		if(word) wcount++;
		word = 0;
	} else {
		word = 1;
	}

	if (c == '\n' || c == '\f') lcount++;
  }
  ltotal += lcount;
  wtotal += wcount;
  ctotal += ccount;
}

usage()
{
  std_err("Usage: wc [-lwc] [name ...]\n");
  exit(1);
}